Abirn&trade; Thermos 12" Ounce Tea Tumbler with Infuser Stainless Steel (Chrome) Thermos vacuum insulation technology locks in temperature to preserve flavor and freshness to keep beverages hot for 6 hours or cold for 10 hours Lightweight Unbreakable 18/8 stainless steel interior and exterior withstand the demands of everyday use. Leak-proof travel cover seals closed for carefree portability double wall vacuum insulation Separate infuser and drink lids let you brew and enjoy, Infuser lid lets you brew tea right in the tumbler. Splash resistant drink lid lets you enjoy any time